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Posted at 5:30 PM ET, 08/ 4/2009

PM Update: Heat and Humidity Join Forces

By Ian Livingston

Warm Wednesday, shower and storm chances late

* NatCast | Hurricane Outlook Revision? | Climate Change & Jellyfish *
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High levels of humidity joined up with heat to create a very summery day across the area. Just a few puffy cumulus and towering cumulus are adding a spot of shade for relief. Highs are rising near 90 degrees in many spots, and if National Airport makes it, this will be the 11th day of the year it has been 90+ there. There's an outside risk of a quick shower or rumble of thunder through evening, though many will probably stay dry.

Radar: Latest D.C. area radar loop shows movement of precipitation over past two hours. Powered by HAMweather. Refresh page to update. Click here or on image to enlarge. Or see radar bigger on our Weather Wall.

Through Tonight: There may be a quick shower or thundershower this evening. Otherwise, it's warm and muggy with temperatures falling through the mid-80s near sunset. Under partly cloudy skies, overnight lows should range from around 70 to the mid-70s.

Tomorrow (Wednesday): Another warm and muggy one is upcoming Wednesday, but more clouds and an increased chance of rain could moderate temperatures a smidge. Still, highs look to rise into the upper 80s to near 90 before a risk of late-day showers and storms arrives.

See Matt Rogers' full forecast through what could be a hot weekend. And if you haven't already, join us on Facebook and follow us on Twitter.

Alaskan Fires: Numerous wildfires are currently burning in interior Alaska -- NASA's Terra satellite captured the view this week. An August 3 report from the Alaska Interagency Coordination Center said 483 fires are burning and about 2.4 million acres are affected. Several of the enormous fires, including the nearly half-million acre Railbelt Complex, were started by lightning.

By Ian Livingston  | August 4, 2009; 5:30 PM ET
Categories:  Forecasts  
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Next: NatCast: Chance of Showers, But on the Low Side


Looks as though Chicago is heading for a major heat wave [98F], and we'll soon be following suit...there goes our nice decent summer!!!

Truth be told, things haven't been quite the same since AugustaJim posted his Bermuda High "threat" my way...thanks to him we're gonna have to "roast" the rest of this summer, not to mention the occasional thunderbolts...meanwhile the "much-needed rain" is being a bit would sure be great to get back that cool, dry air, provided we don't have to put up with some doozy of a derecho such as Louisville & Knoxville got earlier today...

Posted by: Bombo47jea | August 5, 2009 12:36 AM | Report abuse

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